Flue-scraper



J. R. NOONAN.

PLUB SGRAPBR.

Palnted Apr. 23,#1895.

W/TNESSES:

. JAMES R. NOONAN,

or DAYTON, OHIO.

FLUE-SCRAPER.

SPECIFICATION forming part of Letters Patent N o. 537,845, dated April23, 1895i.

Application tiled February 4, l 8 95.

To all whom t may concern.-

Be it known that I, JAMES R. N OONAN, of Dayton, county of Montgomery,State of Ohio, have invented a new and useful Improvement inFlue-Scrapers; and I do declare the fol-- lowing to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon,which form a part of this specification.

This invention relates to new and useful improvements in flue scrapers.

The object of the invention is to provide a iiue scraper that willmaterially lessen the amount of manual labor necessary in cleaning theflues of boilers.

To this end my invention consists of acon? Lstruction that will be fullydescribed in the following specification, and specifically set out inthe claims.

In the accompanying drawings which form a part of the application,Figure l, designates alongitudinal elevation of my improved fluescraper. Thisview, as indicated by the arrow, shows the scraper beingdriven into a iiue, the latter appearing in dotted lines. Fig. 2 is aview similar to Fig. l. This view, as indicatedby the arrow, shows thescraper being drawn out of a flue, the latter appearing in dotted lines.Fig. 3 is a top view of the scraper; Fig. 4, a reduced View showing oneof the blades, looking in the direction of the horizontal arrow ineither Figsl or 2; Fig. 5, a section on the line -.r Fig. 2.

Referring in detail to the drawings, (A) and (B) designate curvedblades, preferably constructed of hard steel. These blades are cut awayor reduced as shown at (b), and have their lower or reduced ends curvedas at (c) to inclose the sleeve (C), to which they are rigidly attachedby means of an'internally screw-threaded collar (D), or in any suitablemanner. When so constructed and attached to the sleeve (0),' they areadapted to expand and contract to perform their functions, by meanspresently described. The semi-circular edges (a) of the blades (A) and(B) are preferably provided with an edgeadapted to Serial No. 537,218.(No model.)

readily cut and remove from the flue any scales or deposits.

(e) and (c) designate angular guide rods partly appearing in dottedlines in Figs. l and 2. These rods are riveted or otherwise rig- 4idlyattached to the center of the blades (A) and (B) on an angle to saidblades substantially as is shown in the drawings.

(G) designates a rod, of any suitable length, which is loosely inclosedby the sleeve (C).

(f) is a cross head rigidly mounted on the upper end of said rod. Thiscross head is provided with eyes in its respective ends (f)-(f) thatloosely inclose said guide rods.

As the rod (G) is moved in and out, the cross head is likewise movedalong the guide rods (e) and (ef). -The effect of this movement is tospread the blades, as shown in Fig. l, until they come in contact withthe surface of the iiue; or to contract said blades, as shown in Fig. 2,and thereby permit their easy removal from the iiue. of inserting saidscraper in the flue, or of withdrawing it therefrom, expands andcontracts the blades, so that no eXtra adjustment or manipulation of thedevice preparatory to placing it in or withdrawing it from the iiue isnecessary. The sliding movement of the rod (G) is regulated or limitedby collars (c') and (if), which are secured by set screws (0) (0').

(g) and (g) designate semi-circular plates which are rigidly attached bymeans of rivets (g), to the mouth of the blades, so as to overlap eachother as shown at (h). The distance of these plates from the front endsof the blades is shown in Figs. 1 and 2. By means of these plates thescales and matter scraped from the flue are prevented from entering themouth of the scraper, and whatever of said matter is scraped from theupper part of the iiue, falls to the bottom through the opening in theblades formed by the cut away portions. The scraper therefore, is in nodanger of becoming clogged up by the scales accumulating between theblades, as they are scraped oif.

From the circular form shown in Fig. 3, it will be seen that the entirecircumference of the iue will come in contactwith the blades,

In other words, the actA IOO and that the pushing in of the scraper willmaintain said blades in contact with the flue. No twisting or screwingis called for in operating the device. One hand grasps the sleeve (C)and holds it, while the other hand manipulates the rod (G).

Having fully described my invention, I claiml. In a lue scraper, thecombination of the curved scraper blades, cutaway as described;semi-circular plates inclosing the outer ends of said blades; guide rodsrigidly attached. to the inner sides of said blades; a sleeve towhichsaid blades are attached; a sliding rod inclosed by said sleeve; and across head mounted on said rod inclosing said guide rods, substantiallyas described.

2. In a flue scraper, the combination with a sleeve, and a sliding rodinclosed by said sleeve; of curved scraper blades, cut away asdescribed,and rigidly attached to said sleeve; angular guide rodsattached to the inner sides of said blades; a cross head on the outerend of said rod inclosing the angular guide rods, and means on saidsliding rod-for limiting the movement thereof, substantially asdescribed.

3. In a flue scraper, the combination with curved metallic scraperblades, and a sleeve.

to which said blades are rigidly attached; of angular guide rods (e) and(e) attached to said blades on an angle thereto substantially asdescribed; a cross head (f) slidingly mounted on said guide rods; a rod(G) in closed by said sleeve, and to which said cross head is rigidlyattached, whereby means -are provided for expanding and contracting saidblades; and means on said rod for limiting the movement thereof,substantially as described.

In testimony whereof I have hereunto set 4o my hand this 15th day ofDecember, 1894.

